He didn't know how long this little ghost had been watching him.
He disliked those crimson eyes.
They reminded him of the first time he tried Refining Little Ghosts when he was desperate, staring into those red eyes that seemed bloodshot with extreme terror and fear.
He was so scared that he had left the little ghost behind and had nightmares for many days until he was truly out of options and went back to find the little ghost he had locked up and weakened for several days.
He wondered if it was because he left halfway and didn't offer sustenance at the beginning, which is why everything he did was particularly lukewarm. The tasks that should have taken two or three days to resolve, as the books said, required several months with the little ghost he had refined.
But because of this, the other party was especially afraid of him and terrified of being abandoned by him once again.